WTC Stabile, also known as Bent Propeller, made out of painted red steel, by the late US artist Alexander Calder, a 25-foot sculpture that was exhibited in the courtyard, survived, although it was crushed by falling debris. Though most of the bent remains are co-mingled with portions of the debris of the WTC, Calder’s grandson has vowed to restore it if enough pieces are found. [Photo/ifar.org]